Partly purified GO in various purification steps was adjusted to SDS-acetate cellulose membrane electrophoresis. Peptides combined with SDS were observed in cathode and anode.

Sodium alginate and fucoidin were further purified, the purity of which was demonstrated homogeneously by chromatography on a sephadex G-75 column and acetate cellulose membrane electrophoresis.

Polymer membrane Recently, polymer membranes made from polyamides and polysulfones have taken the place of cellulose acetate, at least for ultrafiltration.